suitable 合适的为什么？从语境看， 说话者认为的是虽好， 但对一个像你这样的学生来说不合适。 注意but 这个关键词再问个问题The mobile phone is missing.Maybe _______ took it away.(填不定代词）someone (或者somebody)那Is_____ in the classroom?The lights are still on.(填不定代词)麻烦再回答一下，我不定代词弄不懂anyone